{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["cause effect", "product producer"], "input": "each sample of the felt was enclosed in a separate glass vial with blanks of polished lead , silver and copper ."}
{"cause effect": [], "product producer": []}